It’s a rule to post with private proxies and harvest ONLY with public proxies. But it can be a pain in the ass to gather public proxies everytime you want to scrape some blogs. You need to find good sources, to test and retest gathered proxies since they can be banned even after 5 minutes of usage. If you want to have public proxies everytime you start scrapebox you should check Proxy Goblin. I use it and it’s a must if you are working with scrapebox. This nice tool can do this things: